I know I know.. it is a bit old news.But considering that most of you do not know about this, here is the summary.HTML5 is the next generation HTML language.It supports all the previous features from HTML4, and doesn't rely on flash to show videos.here is the copy pasted part from wiki:

New APIs

In addition to specifying markup, HTML5 specifies scripting application programming interfaces (APIs).[13] Existing document object model (DOM) interfaces are extended and de facto features documented. There are also new APIs, such as: